The Bootstrap

Resampling your own data

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• The bootstrap resamples your own data, with replacement, many times.
• The spread of the resampled statistic estimates its standard error.
• It works for medians and other statistics with no simple formula.

Steps

1. Pulling yourself up
2. The classic formula
3. Resample the commutes
4. Why with replacement?
5. A percentile interval
6. A third of the uncertainty